Most lead isotope data from barite ores, galena-beari ng black shales and black shales (host rock) are plotted on or around the extend ed line of upper crust, indicating an isogenetic origin.

• 对取自天柱大河边重晶石矿床的重晶石样品和含方铅矿黑色页岩样品进行了铅同位素测定与研究。